BC Climate: Monthly summary and long term trends

Author

Affiliation

Aseem Sharma e-mail: aseem.sharma@gov.bc.ca

Future Forest Ecosystems Centre, FCCSB, OCF, BC Ministry of Forests

1 December-2024 climate summary

BC climate summary of December-2024. The average anomaly ranking (higest positive anomaly being 1) and trends are for 1950 -2024.

Measures	Mean Temperature	Precipitation	Vapour pressure deficiet (VPD)	Relative Humidity	Soil moisture
Spatial average anomaly	4.18	14.32	-0.02	5.21	2.22
Spatial minimum anomaly	0.26	-33.36	-0.31	-2.29	-24.78
Spatial maximum anomaly	7.50	107.67	0.45	11.41	26.90
Average anomaly ranking	3.00	31.00	39.00	1.00	15.00
Spatial average trend	0.02	-0.33	0.00	0.00	0.01
Spatial minimum trend	-0.01	-0.90	0.00	-0.08	-0.28
Spatial maximum trend	-0.01	-0.90	0.00	-0.08	-0.28
Linear trend	0.03	-0.30	0.00	0.00	0.02
Linear trend p-val	0.10	0.07	0.01	0.87	0.12

Below you find the spatial anomalies and long term trend of air temperature, vapor pressure deficit (VPD), total monthly precipitation, relative humidity (RH), and volumetric soil moisture (0 - 1m depth) for the month of December-2024.

2 Mean temperature and vapor pressure deficit (VPD)

2.1 Anomaly: December-2024

Figure 1: Anomalies in mean temperature and VPD for December 2024 relative to climate average of December 1981 - 2010.

2.2 Last 12 months anomaly: November 2023 to December 2024

Figure 2: Average anomalies in mean temperature and VPD for November 2023 to December 2024 relative to climate average of 1981 - 2010 .

2.3 Long term trends

2.3.1 Spatial trends: December 1950 - 2024

Figure 3: Spatial trends of mean temperature and VPD anomalies for December 2024 :1950 - 2024 .The black dots indicate grid cells with statistically signficnat trends. Anomalies are calcuated relative to 1981-2010 climatology

2.3.2 Time series trends: December 1950 - 2024

Figure 4: Trend in spatially averaged anomalies of mean temperature and VPD for December 2024 :1950 - 2024 . Anomalies are calcuated relative to 1981-2010 climatology

3 Precipitation, Relative Humidity (RH) and soil moisture

3.1 Anomaly: December-2024

Figure 5: Anomalies in total precipitation, relative humidity and volumetric soil mositure (0-1m) for December 2024 relative to climate average of December 1981 - 2010.

3.2 Last 12 months anomaly: November 2023 to December 2024

Figure 6: Anomalies in total precipitation, relative humidity and volumetric soil moisture (0-1m) for November 2023 to December 2024 relative to climate average of 1981 - 2010.

3.3 Long term trends

3.3.1 Spatial trends: December 1950 - 2024

Figure 7: Spatial trends of precipitation, relative humidity, and soil moisture anomalies for December 2024 :1950 - 2024 .The black dots indicate grid cells with statistically signficnat trends. Anomalies are calcuated relative to 1981-2010 climatology

Figure 8: Trend in spatially averaged anomalies of precipitation, relative humidity and soil moisture for December 2024 :1950 - 2024 . Anomalies are calcuated relative to 1981-2010 climatology

4 BC seasonal and annual climate trends

Below you find a summary table and the spatial and long term trend plots of air temperature, vapor pressure deficit (VPD), total monthly precipitation, relative humidity (RH), and volumetric soil moisture (0 - 1m depth) for each season and annual data.

4.1 Winter

BC climate summary of winter 2024. The average anomaly ranking (higest positive anomaly being 1) and trends are for 1950 -2024.

Measures	Mean Temperature	Precipitation	Vapour pressure deficiet (VPD)	Relative Humidity	Soil moisture
Spatial average anomaly	3.15	16.07	0.00	3.49	-5.07
Spatial minimum anomaly	0.55	-25.96	-0.27	-0.98	-22.14
Spatial maximum anomaly	5.42	64.72	0.30	8.01	12.00
Average anomaly ranking	9.00	47.00	19.00	14.00	5.00
Spatial average trend	0.04	-0.14	0.00	0.02	0.01
Spatial minimum trend	0.01	-0.62	0.00	-0.04	-0.32
Spatial maximum trend	0.01	-0.62	0.00	-0.04	-0.32
Linear trend	0.04	-0.15	0.00	0.02	0.01
Linear trend p-val	0.00	0.17	0.00	0.02	0.41

4.1.1 Mean temperature and VPD

4.1.1.1 Spatial trends

Figure 9: Spatial trends of the anomalies of mean temperature and VPD for winter:1950 - 2024 .The black dots indicate grids with significant trends. Anomalies are calcuated relative to 1981-2010 climatology.

4.1.1.2 Time-series trends

Figure 10: Trend in spatially averaged anomalies of mean temperature and VPD for winter:1950 - 2024 . Anomalies are calcuated relative to 1981-2010 climatology.

4.1.2 Precipitation, relative humidity and soil moisture

4.1.2.1 Spatial trends

Figure 11: Spatial trends of the anomalies of precipitation, relative humidity, and soil mositure for winter:1950 - 2024 .The black dots indicate grids with significant trends. Anomalies are calcuated relative to 1981-2010 climatology.

4.1.2.2 Time-series trends

Figure 12: Trend in spatially averaged anomalies of precipitation, relative humidity and soil mositure for winter:1950 - 2024 . Anomalies are calcuated relative to 1981-2010 climatology.

4.2 Spring

BC climate summary of spring 2024. The average anomaly ranking (higest positive anomaly being 1) and trends are for 1950 -2024.

Measures	Mean Temperature	Precipitation	Vapour pressure deficiet (VPD)	Relative Humidity	Soil moisture
Spatial average anomaly	0.82	-20.08	0.60	-1.97	-5.06
Spatial minimum anomaly	-0.60	-67.65	-0.17	-6.03	-17.43
Spatial maximum anomaly	2.26	43.36	1.87	3.16	13.93
Average anomaly ranking	14.00	54.00	10.00	74.00	30.00
Spatial average trend	0.03	0.09	0.01	-0.01	0.03
Spatial minimum trend	0.01	-0.23	0.00	-0.12	-0.19
Spatial maximum trend	0.01	-0.23	0.00	-0.12	-0.19
Linear trend	0.03	0.10	0.01	-0.01	0.03
Linear trend p-val	0.00	0.19	0.00	0.21	0.01

4.2.1 Mean temperature and VPD

4.2.1.1 Spatial trends

Figure 13: Spatial trends of the anomalies of mean temperature and VPD for spring:1950 - 2024 .The black dots indicate grids with significant trends. Anomalies are calcuated relative to 1981-2010 climatology.

4.2.1.2 Time-series trends

Figure 14: Trend in spatially averaged anomalies of mean temperature and VPD for spring:1950 - 2024 . Anomalies are calcuated relative to 1981-2010 climatology.

4.2.2 Precipitation, relative humidity and soil moisture

4.2.2.1 Spatial trends

Figure 15: Spatial trends of the anomalies of precipitation, relative humidity, and soil mositure for spring:1950 - 2024 .The black dots indicate grids with significant trends. Anomalies are calcuated relative to 1981-2010 climatology.

4.2.2.2 Time-series trends

Figure 16: Trend in spatially averaged anomalies of precipitation, relative humidity and soil mositure for spring:1950 - 2024 . Anomalies are calcuated relative to 1981-2010 climatology.

4.3 Summer

BC climate summary of summer 2024. The average anomaly ranking (higest positive anomaly being 1) and trends are for 1950 -2024.

Measures	Mean Temperature	Precipitation	Vapour pressure deficiet (VPD)	Relative Humidity	Soil moisture
Spatial average anomaly	2.30	-21.05	1.60	-5.51	-10.15
Spatial minimum anomaly	0.52	-67.06	-0.47	-15.84	-36.86
Spatial maximum anomaly	3.17	40.93	5.46	4.30	11.31
Average anomaly ranking	7.00	42.00	10.00	58.00	60.00
Spatial average trend	0.04	0.12	0.01	-0.03	-0.06
Spatial minimum trend	-0.01	-0.53	-0.01	-0.15	-0.30
Spatial maximum trend	-0.01	-0.53	-0.01	-0.15	-0.30
Linear trend	0.04	0.09	0.02	-0.03	-0.07
Linear trend p-val	0.00	0.19	0.00	0.06	0.02

4.3.1 Mean temperature and VPD

4.3.1.1 Spatial trends

Figure 17: Spatial trends of the anomalies of mean temperature and VPD for summer:1950 - 2024 .The black dots indicate grids with significant trends. Anomalies are calcuated relative to 1981-2010 climatology.

4.3.1.2 Time-series trends

Figure 18: Trend in spatially averaged anomalies of mean temperature and VPD for summer:1950 - 2024 . Anomalies are calcuated relative to 1981-2010 climatology.

4.3.2 Precipitation, relative humidity and soil moisture

4.3.2.1 Spatial trends

Figure 19: Spatial trends of the anomalies of precipitation, relative humidity, and soil mositure for summer:1950 - 2024 .The black dots indicate grids with significant trends. Anomalies are calcuated relative to 1981-2010 climatology.

4.3.2.2 Time-series trends

Figure 20: Trend in spatially averaged anomalies of precipitation, relative humidity and soil mositure for summer:1950 - 2024 . Anomalies are calcuated relative to 1981-2010 climatology.

4.4 Fall

BC climate summary of fall 2024. The average anomaly ranking (higest positive anomaly being 1) and trends are for 1950 -2024.

Measures	Mean Temperature	Precipitation	Vapour pressure deficiet (VPD)	Relative Humidity	Soil moisture
Spatial average anomaly	2.35	-23.69	0.34	-1.54	-4.87
Spatial minimum anomaly	0.13	-58.88	-0.28	-6.22	-29.08
Spatial maximum anomaly	4.59	45.79	1.47	3.37	22.78
Average anomaly ranking	34.00	25.00	26.00	28.00	36.00
Spatial average trend	0.02	0.02	0.00	-0.01	0.00
Spatial minimum trend	0.00	-0.23	0.00	-0.08	-0.24
Spatial maximum trend	0.00	-0.23	0.00	-0.08	-0.24
Linear trend	0.02	0.03	0.00	-0.01	0.01
Linear trend p-val	0.01	0.67	0.11	0.36	0.75

4.4.1 Mean temperature and VPD

4.4.1.1 Spatial trends

Figure 21: Spatial trends of the anomalies of mean temperature and VPD for fall:1950 - 2024 .The black dots indicate grids with significant trends. Anomalies are calcuated relative to 1981-2010 climatology.

4.4.1.2 Time-series trends

Figure 22: Trend in spatially averaged anomalies of mean temperature and VPD for fall:1950 - 2024 . Anomalies are calcuated relative to 1981-2010 climatology.

4.4.2 Precipitation, relative humidity and soil moisture

4.4.2.1 Spatial trends

Figure 23: Spatial trends of the anomalies of precipitation, relative humidity, and soil mositure for fall:1950 - 2024 .The black dots indicate grids with significant trends. Anomalies are calcuated relative to 1981-2010 climatology.

4.4.2.2 Time-series trends

Figure 24: Trend in spatially averaged anomalies of precipitation, relative humidity and soil mositure for fall:1950 - 2024 . Anomalies are calcuated relative to 1981-2010 climatology.

4.5 Annual

BC climate summary of 2023. The average anomaly ranking (higest positive anomaly being 1) and trends are for 1950 -2023.

Measures	Mean Temperature	Precipitation	Vapour pressure deficiet (VPD)	Relative Humidity	Soil moisture
Spatial average anomaly	2.15	-11.86	0.63	-1.38	-6.29
Spatial minimum anomaly	0.42	-42.66	-0.16	-5.66	-22.04
Spatial maximum anomaly	3.63	36.40	1.84	3.49	11.77
Average anomaly ranking	1.00	71.00	1.00	66.00	74.00
Spatial average trend	0.03	0.02	0.01	-0.01	-0.01
Spatial minimum trend	0.01	-0.25	0.00	-0.09	-0.15
Spatial maximum trend	0.01	-0.25	0.00	-0.09	-0.15
Linear trend	0.03	0.01	0.01	-0.01	-0.01
Linear trend p-val	0.00	0.91	0.00	0.20	0.68

4.5.1 Mean temperature and VPD

4.5.1.1 Spatial trends

Figure 25: Spatial trends of the anomalies of mean temperature and VPD for annual:1950 - 2024 .The black dots indicate grids with significant trends. Anomalies are calcuated relative to 1981-2010 climatology.

4.5.1.2 Time-series trends

Figure 26: Trend in spatially averaged anomalies of mean temperature and VPD for annual:1950 - 2024 . Anomalies are calcuated relative to 1981-2010 climatology.

4.5.2 Precipitation, relative humidity and soil moisture

4.5.2.1 Spatial trends

Figure 27: Spatial trends of the anomalies of precipitation, relative humidity, and soil mositure for annual:1950 - 2024 .The black dots indicate grids with significant trends. Anomalies are calcuated relative to 1981-2010 climatology.

4.5.2.2 Time-series trends

Figure 28: Trend in spatially averaged anomalies of precipitation, relative humidity and soil mositure for annual:1950 - 2024 . Anomalies are calcuated relative to 1981-2010 climatology.

This report compliment the BC climate anomaly app . Should you have any questions, please contact Aseem Sharma .